Nano Banana 2 catalog photos: draft at 0.5K, finish at 2K

How do I cut the cost of a catalog photo batch with Nano Banana 2?

Draft every shot at the 0.5K tier, approve the composition, then re-render only the approved ones at 2K. Nano Banana 2 prices by resolution, so the cheap tier is where you iterate on angles and props.

On Sume, google/nano-banana-2 takes a resolution of 0.5K, 1K, 2K or 4K. The values below are the vendor's list rates, not Sume's price; Sume's billed price comes from the endpoint record for the model.

What does each tier cost at the vendor?

The Nano Banana 2 page on fal gives a per-image rate for each resolution, and describes the model as built on the Gemini 3.1 Flash Image architecture with an emphasis on accurate text rendering and character consistency. It also notes extra charges for web search and high thinking, which a plain product shot does not use.

What does a draft-then-final run save?

Take 20 SKUs, three draft rounds each, and one final each. At vendor list rates that is 60 drafts at $0.06, which is $3.60, plus 20 finals at $0.12, which is $2.40, for $6.00. Rendering all four rounds per SKU at 2K would be 80 images at $0.12, or $9.60.

The saving is $3.60 on this example, and it depends on your reject rate. If most first drafts are approved, the gap shrinks. Treat the numbers as a worked example of vendor rates, not a quote.

Which ratios fit marketplace listings?

Sume's catalog lists auto, 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3 and 9:16 for Nano Banana 2, plus the banner ratios 4:1, 1:4, 8:1 and 1:8. A square 1:1 and a 4:5 portrait cover most listing grids. The docs say 4:5 is Instagram portrait, and that an exact 1080x1350 file needs a post-step, since the native output is smaller.

Pick the model per job. The vendor page for Nano Banana Pro lists a standard rate of $0.15 per image and $0.30 at 4K, so Pro is the finishing choice only when a shot needs it; the comparison is covered in Nano Banana Pro vs Nano Banana 2 on Sume.